Tool and article holder



May 13, 1930. J. A. LELAND TOOL AND ARTICLE HOLDER Filed Jan. 15

INVENTOR ATTORNEY Patented May 13, 1930 UNITEDSTATES PATENTFOFFICE}JOHNIADDISONLEIQAND, or MILLEBS FALLS, massadnusnrrshssrenon'ro MIILLERSFALLS COMPANY, or MILLERS FAL s'MAssAo usErrs, A oonroa'a'rrou or MAS-will be exemplified in the article hereinafter 1 described and the scopeof the application of V sAoHUsETrsf.

TOOL AND ARTICLE nomina Application filedJ'anuary "is, 192 3. Serial No.612,585 1 l This invention relates to tool holders inthe nature ofchucks, and in its morespecific aspects to jaws for gripping tool headsor other angular articles and to mechanism for sup porting and operatingsuch jaws.

An object of the invention is to provide a gripping jaw which willfirmly and securely hold an angular article. c V

' A further object is to provide gripping jaws of such a nature that thegrasp of the jaws is distributed uniformly;

A still further object is to provide simple supporting and operatingmechanism for A 1 gripping jaws whereby the jaws may be readily operatedand from which they may be easily disengaged.

Another obj eat is that of providing a chuck which will eificientlyperformthe purposes for which it isintende'd and which will also beeconomically and readily manufactured and assembled.

Other objects of the invention will in part be obvious and will inafter.

' The invention accordingly comprises anarticleof manufacture possessingthe features, properties, and the relation of elements; which part'appear hereinwhich will be indicated in the claims.

and objects of the invention reference should- Fig. 5 is aperspectiveview of the jaw; and Fig. 6 IS. a section showing the aws inen-- gagement with an angular tool head. 7 V

The particular-tool illustrated comprises a stem or shank 1, onone endof which is formed an angular tool head, which may be of any convenienttype, and which in the formshown in the drawings consists of a squaredportion having shanks 7 .7, which are adapted to extend into "the'slot4, and to be disengaged therefrom, by

displacing it laterally.

.2 having side's which'converge outwardly from the stem.- At the end ofthe shank 1,

opposite the angular head 2, there'is in'the present instance a head- 3,which has formed therein a transverse notch or slot tiand a pin5eX'tends1a'cross-this space and isa dapted to strengthen the slottedend of the head'3, and r to serve as a fulcrumrfor a pair of jaws 6-6,

Adjacent to the connection betweenthe squared portion and the body ofthe jaw, each jaw has a'tr'ansverse groove 8, for engagingthe pin 5, andthejaws areso shaped on their inner faces that they may rock onthe pin,as indicated'in Figs. 1 and 2. Onthe opposite side of the'notch 8fromthe squared end 7, each jaw is curved transversely as shown, and thejaws are arranged with their concave faces adjacent The curved portionsofthe jaws'flare away from'the groove, that is the radius of the arcupon which this portion of the jaw iscurved gradually increases from thegroove outwardly. .Each jaw is longitudinally slotted at 9' intermediateits side edges, at-the curved portion .of the jaw,and theslot graduallyincreasesin width toward thefree end-ofthe a 1 jaw, but stops shorto'fthefree end as shown. 'For a fuller understanding of the nature} intheconstruction shown squared The shape of the jawsatthe curved portionsI is such that when the'jaws aregrippe duponthe square portion of acutting bit shank, a cross-section ofthe jaws will be a true circle,

as shown inFig. 6. The slots. 9recei've one angle of the-square portionofthecutting'bit 10, and from thisresults that each jaw grips thecuttingbit shank in four places, and the awsas awhole grip'the shank ineight places,

tWo at each face. Thusa very secure grip is obtained, andthe shoulderthereof engages the oute'r'ends of the slots 9, to preventpulling of thecutting bit from the jaws, during the withdrawal of the bit." The Icuttin'g bitis thus held firmly both when entering and when withdrawingthe cutting bit.

I :The jaws are clamped i on the cutting bit shankx'and releasedtherefrom, by asleevell 5,100 V which is mounted to move longitudinallyof formed between thes'quare portion of the'shank and the body 7t-he'shank. The sleeve is rotatably connected with a nut 12 which has aroughened extension 13 for convenience in manipulatinghthe same and thenutis adapted to "engage a threaded portion 14 of the shank, adjacentto, the heads By means of the nut, the sleeve 11 may be movedlongitudinally of the shank in either direction to close the jaws on thecut- 1 ting, bit, as indicated in Fig, 1,0 1 to release true circle. v pAs many changes couldi'be; made in the the jaws as indicated in Fig. 2.p

The jaws are'supporte'd-by a singlepin, and they are engaged with thepin by lateral displacement with respect to the head, that isby rterminating short of said outer end, the edges of said opening extendingat angles to each other and to the side edges of said bodies e wherebythe shouldered shank of a tool as- In testimony-whereof I aflixmyfsignature.

' V 'aoHN ADDISG-NFY'IJELAAND.

movement radial to the. shank, ith'theend lofthe sleeve ll level withthe pin 8, there is no possibility of displacement V of the aws fromthepin. The sleeve must be moved back into the. positionof Fig. 2,orfarthenbefore I the'j aws will release from the pin; When the theycoop- 7 eratetoi'orm a socket, which gradually 111-.

j aws are moved toward eaclrothe-r,

creases inlcross-section toward the free ends and which when clamp ed upop of the jaws,

bit shank form'a the square portion ofthe above construction and manyapparently widely different embodiments of this invention could be madethe scope thereof, it isintendedthat all matter contained in theabovedescription or shown in the accompanying drawin'g'sflshallIbeinwithout departing from terpreted as illustrated and not in'a limitingvsense. 7 e g 7 It is alsolto beunderstood? that the language used in thefollowing claims is intended to v cover all of the generioandspecifiefeatures of the inventionherein described, and all.

'said to fall therebetween,

statements of the scope of the invention,"

which, as a matter of language, lni-ghtbe Having described my invention,What I claim a-snewand desire 1:01 secure by Letters Patentis:

1.. A chuck,'1nclud ng, n comb nation, a

' pairof'jaws, and means for moving and supporting the same, each 7 p ofsaidjaws incl-udrng an lnteriorly transverselyand longit-ur"dinal'ly-curved body flared towards its outer 'shank e'ngagingelements. I

end and being provided. with a longitudinall ext-endingopeningsubstantiallycentrally of its side edges anditer'minati-n'gshort 1 ofthe 'outerelld ot-sai-d bodyithe outeriends ofthe openings and theedgej-portionswof said openings and 0t said jaws constitutingbitr 2.chuck,includ ngarpalrlof and I i p ineans for mounting andrmovingthesame, i saidjawsr each including a body: presenting zt'transverselycurved. inner face and being fiareclto its-'outer -end tohaveside'edge-port i ons extending; at an angle 'to each other,

each bit said. jaws b'eingfgformed with an 1 1 area towards the outerend of thesameand thrdughitsbo dy of an increasing

